I'm sorry you had bad experiences with doctors. Whenever I or my sisters have gone to a GP for a mental health problem (we may not even know it's a mental health problem at first, it can be difficult to distinguish between the two sometimes) they usually give us two referrals: One to a counsellor and one to a doctor qualified to diagnose mental illness. This is of course after testing for deficiencies, but we always get to proper help in the end and we're a lot better because of it.
You make a strong point about depression skewing reality, which I like but the elements of reality and what's distorted is confusing for those playing. Making the player experience what the protagonist is feeling is important, but when it gets in the way of the core values of the game or miscommunicates something it can leave multiple, possible unwanted interpretations. In my case, I tried to interpret it in three ways.
One where the game was entirely in someone's imagination, one where everything was reality and one where it was somewhere in between. Your game falls somewhere in between meaning, like I said before, what is real and what is distorted is unclear and since you're the creator it's probably glaringly obvious to you but to those who don't have insight into who the creator is and their motives (such as your bad experiences with doctors) assumptions have to be made in order to reach a conclusion.
I understand how you can come into a project with so many hopes and aspirations and for the reservoir to be drained by the end, so you don't need to worry about touching the game again, especially since the various interpretations were due to miscommunication and not from morose intentions. As a word of warning, I think if you don't make a statement regarding the multiple interpretations it will continue to be perceived that way.